// Problem: 
// Contest: 
// URL: 
// Memory Limit: 
// Time Limit: 
// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#include<bits/stdc++.h>
using namespace std;
#define int long long
inline int read(){
	int s=0,w=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')w=-1;ch=getchar();}
	while(ch>='0'&&ch<='9') s=s*10+ch-'0',ch=getchar();
	return s*w;
}
signed main()
{
	int t=1;
//	cin>>t;
	while(t--)
	{
		int n,sum=0,ans,cnt=0;
		cin>>n;
		for(int i=1;(1<<(i-1))<=n;i++)
		{
			int tmp=0;
			for(int j=1;j<=1<<(i-1);j++)
			{
				int x;
				cin>>x;
				tmp+=x;
				if(++cnt==n)
				{
					break;
				}
			}
			if(tmp>sum)
			{
				sum=tmp;
				ans=i;
			}
		}
		cout<<ans;
	}
	return 0;
}
